Master Edexcel IGCSE Human Biology (4HB1) by refining your command word precision, perfecting your biological drawings, showing explicit workings in mathematical questions, and avoiding classic spelling and conceptual traps like 'ureter' vs 'urethra' and vaccine contents.
阅读时间 4 分钟更新于: 2026年6月21日
试卷概览
卷数
2
总分
180
考试时间
3小时 30分钟
题型
4
试卷
时间
分数
题数
比重
题型
Paper 1R (Regional)
1小时 45分钟
90
26
50%
Sentence Completion / Gap Fill, Calculation, Diagram Drawing / Labeling, Short Answer / Identification, Extended Answer / Explanation
Paper 2R (Regional)
1小时 45分钟
90
27
50%
選擇題, Sentence Completion / Gap Fill, Calculation, Diagram Drawing / Labeling, Short Answer / Identification, Extended Answer / Explanation
评级
987654321U
计算器规定
A scientific or graphical calculator is permitted. Graphical calculators must be in exam mode with all stored programs and data cleared before the exam; the calculator must not be able to retrieve stored text or formulae.
AO1: AO1: Knowledge and understanding of human biology (40%)
AO2: AO2: Application of knowledge and understanding, analysis and evaluation (38%)
AO3: AO3: Experimental skills, analysis and evaluation of data and methods (22%)
根据历届试题与评分标准整理（2023–2025）。
计算器程序
Table mode for roots & turning points
Scientific calculator (e.g. Casio fx-991 series)
用途: Tabulate \(y\) across a range of \(x\) to locate sign changes (roots) and approximate maxima/minima.
使用时机: Solving or sketching a function when you want to find where its graph crosses or turns.
步骤
Enter the function in TABLE mode, set the start, end and step, then read where the sign of \(y\) changes or where it peaks.
考试提示: Allowed, but clear stored programs/data (graphical calculators in exam mode) and show the required working — unsupported calculator answers score no method marks.
Statistics mode (mean, SD & regression)
Scientific calculator (e.g. Casio fx-991 series)
用途: Read the mean \(\bar{x}\) and standard deviation directly, and the gradient/intercept (and \(r\)) of a linear regression for bivariate data.
使用时机: Any data-handling, statistics, or required-practical analysis question.
步骤
Enter the data in STAT mode (1-VAR or A+BX), then recall \(\bar{x}\), \(\sigma\) or the regression coefficients.
考试提示: Allowed, but clear stored programs/data (graphical calculators in exam mode) and show the required working — unsupported calculator answers score no method marks.
Carry exact values with Ans & memory
Scientific calculator (e.g. Casio fx-991 series)
用途: Keep full-precision intermediate values to avoid rounding errors.
使用时机: Multi-step calculations where premature rounding loses the final accuracy mark.
步骤
Use Ans, STO/RCL or the M+ memory to reuse the unrounded result of each step; round only the final answer.
考试提示: Allowed, but clear stored programs/data (graphical calculators in exam mode) and show the required working — unsupported calculator answers score no method marks.
Equation solver — to CHECK your working
Scientific calculator (e.g. Casio fx-991 series)
用途: Use the built-in EQN/SOLVE mode to verify roots of quadratics or simultaneous equations you have already solved by algebra.
使用时机: As a check only, after solving by hand.
步骤
Enter the coefficients in EQN mode (or use SOLVE) and confirm they match your worked solution.
考试提示: Allowed, but clear stored programs/data (graphical calculators in exam mode) and show the required working — unsupported calculator answers score no method marks.
常见错误
1high涉及分数: 2Homeostatic mechanisms
Confusing the 'ureter' with the 'urethra' in anatomical descriptions of the urinary system.
如何避免: Use a simple spelling rule: the ureteR runs from the kidney to the Bladder (R comes before B in 'Ureter' to 'Bladder' pipeline), while the urethRa carries urine Out of the body (R is closer to Out/Release).
2high涉及分数: 2Internal transport
Forgetting to convert units from dm3 to cm3 (or vice-versa) during cardiac output calculations.
如何避免: Always check the units specified in the question prompt and the answer line. Remember that 1 dm3 = 1000 cm3. Write down your conversion factor before starting any math.
3medium涉及分数: 2Disease
Stating that vaccines contain antibodies instead of antigens.
如何避免: Always state that vaccines contain dead, weakened, or inactive pathogens which possess specific antigens. These antigens stimulate the host's lymphocytes to produce their own complementary antibodies.
4medium涉及分数: 1Cells and tissues
Drawing lines or curves of best fit freehand or using sketchy, double-drawn lines on graphs.
如何避免: Always use a sharp pencil and a ruler for straight lines of best fit, or a single, smooth, continuous curved line if the trend is non-linear. Never connect points dot-to-dot unless explicitly directed.
5high涉及分数: 2Coordination
Failing to specify that ciliary muscles relax (and not suspensory ligaments contracting) during accommodation for distant vision.
如何避免: Remember that suspensory ligaments are non-muscular and cannot contract actively. The ciliary muscles relax, which pulls the suspensory ligaments tight/taut, stretching the lens thin.
6medium涉及分数: 2Internal transport
Using everyday colloquial terms like 'scab' when describing blood clotting processes.
如何避免: Use accurate scientific terms: explain that platelets release chemical factors leading to the formation of a fibrin mesh/plug that traps red blood cells to block pathogen entry.
7high涉及分数: 3Reproduction and heredity
Leaving genetics genotype representations without the sex chromosomes (X and Y) when detailing sex-linked diseases like colour blindness.
如何避免: Always write sex-linked alleles as superscripts on the sex chromosomes: e.g., use X^B and X^b for genotypes instead of just B and b.
8medium涉及分数: 1Bones, muscles and joints
Confusing tendons and ligaments in skeletal labelling.
如何避免: Remember the mnemonic: Tendons Tie muscle to bone (T-T); Ligaments Link bone to bone (L-L).
9medium涉及分数: 2Reproduction and heredity
Failing to divide or multiply values by 60 when converting calculation tasks involving time between seconds and minutes.
如何避免: Underline the time units requested on the final answer line (e.g. per minute vs per second) and ensure you convert your calculated intermediate figures accordingly.